“large-scale meta-analysis of research results from 206 documents and 24,483 judges’ records revealed that all of us, even police and judges, fare little better than chance when assessing whether or not someone is lying. On average people made correct truth-lie judgments only 54 percent of the time.7 Interestingly, while most people operate with a truth bias, law enforcement officials skew in the other direction, operating with a slight lie bias. Nevertheless, neither approach is appreciably more accurate than the other. In another study of 509 people, including law enforcement personnel such as members of the US Secret Service, Central Intelligence Agency, Federal Bureau of Investigation, National Security Agency, and Drug Enforcement Agency, only the Secret Service performed significantly better than chance at detecting if a subject was lying.”